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%D \module
%D [ file=typo-lan,
%D version=2013.03.22,
%D title=\CONTEXT\ Typesetting Macros,
%D subtitle=Language Goodies,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\writestatus{loading}{ConTeXt Typography Macros / Languages}
\unprotect
\registerctxluafile{typo-lan}{}
%D \macros
%D {averagecharwidth, charwidthlanguage}
%D
%D This is a more \MKIV-ish variant of lang-frq.mkiv. The methods are gone as one
%D doesn't need the tables for them. The main macro is \type {\averagecharwidth}
%D which behaves like a dimension register.
%D
%D I finally decided to reimplement this as I needed it for a manual (which is often
%D a reason for such a rewrite). With some inspiring Porcupine Tree in the
%D background it's not the worst thing to do.
\mutable\def\charwidthlanguage{\currentmainlanguage}
\permanent\def\averagecharwidth {\dimexpr\clf_averagecharwidth{\charwidthlanguage}\scaledpoint\relax}
\permanent\def\languagecharwidth#1{\dimexpr\clf_averagecharwidth{#1}\scaledpoint\relax}
\protect
\continueifinputfile{typo-lan.mkiv}
\setuplayout[backspace=4cm]
\showframe
\starttext
\startbuffer
\mainlanguage[en] \hsize65\averagecharwidth \normalexpanded{\inleft{\the\hsize}} \input ward \par
\mainlanguage[de] \hsize65\averagecharwidth \normalexpanded{\inleft{\the\hsize}} \input ward \par
\mainlanguage[nl] \hsize65\averagecharwidth \normalexpanded{\inleft{\the\hsize}} \input ward \par
\stopbuffer
\getbuffer \blank
\switchtobodyfont[pagella]
\getbuffer \blank
\switchtobodyfont[tt,8pt]
\getbuffer
\stoptext
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